A Series of Lanthanide(III)-bpdo-Octacyanotungstate(V) Compounds (bpdo=4,4 '-Bipyridine-N,N '-dioxide) Involving the Structural Transformation from Ion Pair to Three-Dimensional Pillared Layer via a Two-Dimensional Layer

作者：Zhou, Hu; Chen, Qi; Yuan, Ai-Hua^*; Zhou, Hong-Bo; Shen, Xiao-Ping; Chen, Lei; Song, You^*

来源：Crystal Growth & Design, 2017, 17(12): 6523-6530.

DOI：10.1021/acs.cgd.7b01196

• METAL-ORGANIC FRAMEWORKS
• BRIDGED LN(3+)-M3+ COMPLEXES
• MAGNETIC-PROPERTIES
• BLOCKING LIGAND
• TRANSITION-METALS
• SPIN-CROSSOVER
• FE
• LN
• EXCHANGE
• GD

The slow diffusion reaction of octacyanometalate [W(CN)(8)](3-), lanthanide ions, and 4,4'-bipyridyl-N,N'-dioxide (bpdo) has generated a series of isostructural three-dimensional pillared-layer networks with general formula [Ln(bpdo)(1.5)(H2O)W(CN)(8)]center dot 0.5CH(3)OH center dot 6H(2)O (Ln = Dy-Yb, Gd), in which Ln(III) atoms adopted an unusual seven-coordinated geometry in the cyanometalate-based lanthanide system. This building approach on the basis of the simultaneous employment of cyanide and bpdo bridges offers potential possibilities for designing and constructing 5d-4f coordination networks with high dimensionalities. Interestingly, the LnIII-bpdo-W-V(CN)(8) system has undergone an unique two-step phase transition upon prolonging the diffusion reaction time, together with the structural changing from initial ion pair through two-dimensional layer to final three-dimensional pillared-layer network. Magnetic studies of all compounds revealed typical and dominant single-ion magnetic behaviors over the weak coupling interactions between spin centers.

• 出版日期2017-12
• 单位南京大学; 江苏大学; 江苏科技大学